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Navicula seibigiana

Lange-Bert. 1993      Category: Symmetrical biraphid

REPORTED AS: Navicula species 3 (Krammer and Lange-Bertalot 1986, Fig. 38: 21) | Navicula seibigii (Krammer and Lange-Bertalot 1991 & 2004, Fig. 63: 1-6) 

Navicula schweigeri


Navicula slesvicensis

LM scalebar = 10 µm = 80 pixels.


Contributor: Loren Bahls - April 2012
Length Range: 26-29 µm
Width Range: 5.2-5.8 µm
Striae in 10 µm: 11-12


Valves are lanceolate with slightly protracted, broadly rounded apices. The axial area is narrow and linear. The central area is small and bordered on each side by one or two short striae. The raphe is filiform with inflated proximal ends. Striae are robust, strongly radiate in the middle, becoming abruptly parallel then convergent near the ends. Areolae are fine and number 34-38 in 10 µm.

Original Description

Author: Lange-Bert. 1993
Length Range: 25-35 µm
Width Range: 5.5-6.5 µm
Striae in 10 µm: 9-11

Original Description

Valves elliptic-lanceolate to linear-lanceolate, ends often slightly protracted for a short distance, very obtusely to almost broadly rounded, length 25-35 µm, breadth 5.5-6.5 µm. Raphe branches filiform with very distinct central pores. Axial area narrow, linear, central area irregularly bordered on both sides due to the shortening of one or two striae, almost rectangular, only slightly enlarged. Striae fairly strongly radiate in the middle, then abruptly parallel, becoming convergent, 9-11/10 µm; lineolae c. 36/10 µm.

Original Images

Cite This Page:
Bahls, L. (2012). Navicula seibigiana. In Diatoms of the United States. Retrieved May 22, 2018, from

Species: Navicula seibigiana

Contributor: Loren Bahls

Reviewer: Sarah Spaulding


Krammer, K. and Lange-Bertalot, H. (1986). Bacillariophyceae. 1. Teil: Naviculaceae. In: Ettl, H., J. Gerloff, H. Heynig and D. Mollenhauer (eds.) Süsswasserflora von Mitteleuropa, Band 2/1. Gustav Fisher Verlag, Jena. 876 pp.

Krammer, K. and Lange-Bertalot, H. (2004). Bacillariophyceae 4. Teil: Achnanthaceae, Kritische Erganzungen zu Navicula (Lineolatae), Gomphonema Gesamtliteraturverzeichnis Teil 1-4 [second revised edition]. In: H. Ettl et al., Suesswasserflora von Mitteleuropa. Spektrum Akademischer Verlad Heidelberg, 468 pp.

Lange-Bertalot, H. (1993). 85 Neue taxa und uber 100 weitere neu definierte Taxa erganzend zur Subwasserflora von Mittleuropa. Bibliotheca Diatomologica 27, 454 p. Cramer, Berlin, Stuttgart.

Lange-Bertalot, H. (2001). Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia. Diatoms of Europe 2: 1-526.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Navicula seibigiana CAS

North American Diatom Ecological Database (NADED)

NADED ID: 46870

Autecology Discussion

Navicula seibigiana has been recorded from 55 ponds and small streams in the Pacific Northwest, where it is present in small numbers. In these waters mean water temperature is 9.3 degrees C, mean pH is 7.6, and mean specific conductance is 120 µS/cm.


Blakiston Beaver Pond A, Waterton Lakes National Park, Alberta: home of Navicula seibigiana.

Credit/Source: Barb Johnston, Parks Canada.

EMAP Assessment

The Environmental Protection Agency (EPA) western Environmental Monitoring and Assessment Program (EMAP) study was completed during the years 2000-2004 (see citations at bottom of this page). Over 1200 streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming) were selected for sampling based on a stratified randomized design. This type of design insures that ecological resources are sampled in proportion to their actual geographical presence. Stratified randomized design also allows for estimates of stream length with a known confidence in several “condition classes” (good or least-disturbed, intermediately-disturbed, and poor or most-disturbed) for biotic condition, chemistry and habitat.

EMAP Distribution

Navicula seibigiana

EMAP Response Plots

Navicula seibigiana

EMAP citations

Results are published in:

Johnson, T., Hermann, K., Spaulding, S., Beyea, B., Theel, C., Sada, R., Bollman, W., Bowman, J., Larsen, A., Vining, K., Ostermiller, J., Petersen, D. Hargett, E. and Zumberge, J. (2009). An ecological assessment of USEPA Region 8 streams and rivers. U.S. Environmental Protection Agency Region 8 Report, 178 p.

Stoddard, J. L., Peck, D. V., Olsen, A. R., Larsen, D. P., Van Sickle, J., Hawkins, C. P., Hughes, R. M., Whittier, T. R., Lomnicky, G. A., Herlihy, A. T., Kaufman, P. R., Peterson, S. A., Ringold, P. L., Paulsen, S. G., and Blair, R. (2005). Environmental Monitoring and Assessment Program (EMAP) western streams and rivers statistical summary. U.S. Environmental Protection Agency Report 620/R-05/006, 1,762 p.

Stoddard, J. L., Peck, D. V., Paulsen, S. G., Van Sickle, J., Hawkins, C. P., Herlihy, A. T., Hughes, R. M., Kaufman, P. R., Larsen, D. P., Lomnicky, G. A., Olsen, A. R., Peterson, S. A., Ringold, P. L., and Whittier, T. R. (2005). An ecological assessment of western streams and rivers. U.S. Environmental Protection Agency Report 620/R-05/005, 49 p.